Intake Manifold Temperature Sensor
Indicates an issue with the intake manifold temperature sensor signal.
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What it means (plain English)
The intake manifold temperature sensor monitors how hot the air is inside the manifold. If it reads too low or too high, the engine can run rough or inefficiently.
What the computer is actually seeing
The Engine Control Module (ECM) expects the intake manifold temperature to be in a certain range, typically between 20°C and 80°C (68°F - 176°F) during normal operation. If the signal is outside this range or fluctuating, it triggers the code.
What a healthy reading looks like
A properly functioning sensor should output a voltage between 0.5V to 4.5V depending on the temperature. A reading below 0.5V or above 4.5V is flagged as a fault.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check the intake manifold temperature sensor connector for damage or corrosion. If so, repair or replace.
- 2Using a multimeter, measure the voltage at the sensor with the key on engine off (KOEO). Expected: 0.5V to 4.5V. If out of range, replace the sensor.
- 3Start the engine and measure the sensor voltage again at idle. Check for smooth voltage changes as the engine warms up. If voltage is erratic or stays fixed, suspect a wiring issue.
- 4Inspect the wiring from the sensor to the ECM for damage, shorts, or opens. Repair any found issues.
- 5Clear the code and take the vehicle for a test drive to see if the code returns. If yes, replacement of the ECM should be considered.
Common causes
- Faulty intake manifold temperature sensor
- Wiring issues or damaged connectors
- Corroded terminals at the ECM
- Air intake obstruction
- ECM malfunction
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderately severe; the vehicle may run inefficiently and affect emissions. Address it soon.
Will the code come back after clearing it?
If the underlying issue isn't fixed, yes, it will likely return.
Why does this code coincide with low performance or poor fuel economy?
The sensor affects the engine's air-fuel mixture, crucial for efficient combustion.
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